Piston inlet-valve.



H. C. SERGEA PatenteafNov. 17, 190s.

PISTON INLET VALVE. APPLIGATIONVFILBD 0012.2, 190s civilian saurasraraivr oFFIoE.

HENRY C. SERGEANT, F WESTFlELD, NEW .ERSEY,V ASSIGNOR TO INGERSOLIrRANDCOMPANY, OF NEW YORK, N.. Y., A CGRPORATION OF NEW JERSEY.

rrsfrolv minar-VALVE.

Specification of Letters Patent.

Patented Noiz'. 17, 190s'.

Applica-donated October 2, 1906. Serial No. 337,117.

- valves and has for its objects to provide certain advantageousfeatures in the construction,4 t'orm and arrangement of the sewral'parts whereby a very simple' device mary;l be employed for limiting theoutward movement of the valve, which device will not be liable to shakeloose from the piston and also whereby an even guidance of the valve isobtained in a very simple manner.

i practical 'embodiment ont' the invention is represented in theaccompanying draw- 1 ings in which nection between the Figure 1 is alongitudinal central section` through the piston taken in the plane ofthe line A-A of Fig. 2 looking in the direction of the arrows. "Fig 2 isa face View of the piston, one-half of the view being taken in sectionin the plane otv the line B-B of Fig. l looking in the direction of thearrows, and Fig. 3 .is a detail section showing a modified form of ringvalve.

1 designates the hollow piston of a doubleactingair compressor. Thecentral pipe 2 is connected ,to the piston and constitutes the inlet'forthe fluid to becompressedll; inthe example represented the ,piston isfurnished on the side opposite to yhe central pipeQ, with a rod 3 forthe purpose of making conpiston and-the motor for driving it.

The piston is provided -in one or both of itsffaces, in the resentinstance both of its faces, with annu ar passages 4 located near theperiphery of the piston. lling valves are arranged to open and close thepassages 4. as follows. An annular' seat 5 isprovided exterior.. to eachpassage 4 and an annular seat (S is provided interior to said passage onthe face of the piston. T he ringvalve comprises external and internalflanges 7 p ed annular stem and 8 forining the face of the valve' `andan inwardly extended `annular stem 9.` Inthe form s hown .in Fig. 1, anoutwardlyextend- 10 is also provided 4on the valve. f The external and.internal flanges 7 and 8 provide valve faces arranged to engage theannular seats 5 and 6 exterior and interior to the annular passage 4 inthe. piston. Theinner circumference of the annular passage 4 in thepiston is turned truly tofjlorm a cylindrical guide for the inwardlyextended annular valve stem 9, the said stem being-turned to lit the soformed cylindrical guide with an easy sliding movement. A plate 11 isscrewed on togtyhe piston face as shown at 12, which plate is providedwith a circumferential flange 13 which is arranged to overlap theinternal flange 8 ofthe ring valve so as to limit the outward movementof the valve. In the form shown in Fig. 1- the periphery 4ot the flange13 is'turned truly to form a cyf lindrical guide for the outwardlyextendedA annular valve stem 10, the 'inner Wall of which is turned tofit the said cylindrical guide with an easy sliding movement. The valvein this instance is thus guided inside and outside of its external andinternal. flanges 7 and 8 which form' the face of the valve.

In the form shown in Fig. 3, the outwardly extended annular valveI stemis eliminated, the valve being guided in this instance by the engagementof its inwardly extended stemr with the cylindrical guide formed on ,the.inner circumference of the annular'passage in' the piston. By providingthe guide for the valve inside of its Iface by screwing the plate whichlimits the outward move ment of the valve, on to the piston, a verysimple and strong device is obtained 1n which the use of all securingbolts is eliminated, the valve at the same time being guidedsuccessful-1y in its movements.

It is evident that various chan es might be resorted to in theconstruction, orm and arrangement of the several parts without departingfrom the spirit and scope of my invention; hence I doA not Wish to limitmyself strictly to the but What I claim is:

1. A hollow piston having an annular passage in its face, a ring valvetherefor comconstructionA herein set forth,

prsing external and internal anges and inf wardly and outwardly extendedannular to the piston having a' guide for the out! stems, a guide on thepiston for the inwardly extended valve stem and a plate having a guidefor the voutwardly extended valve stem and serving to l'imit the outwardmovement of the valve.

2. A hollow piston having an annular passage in its face, a ring valvetherefor comprlsing vexternal and internal flanges and in-` wardly and`outwardly extended annular stems, a g'uide on the piston for theinwardly v extended valve stem and a plate screwed on Wardly extendedvalve Stem and serving to limit the outward movement of the valve.

In testimony, that I claim the foregoing as my invention, I have signedmy name in 'presence of two witnesses, this first day of .October 1906.

.HENRY C. SERGEANT.

